Lamp



Jlly 10, 1928.

c; D. RYDER Filed Oct. 29, 1924 2 SheeS-Sheef C. D. RYDER July 10,1928.

LAM P 2 sheets-sheet 2 Filed Oct. 29. 1924 Patented July 10, 1928.-

pai'rso STATES PATENT asian-2 l Frm f CHARLES D. RYDER, orv COVINGTON, KENTUCKY, AssiGNoR .To THE crNCiNNATr VICTOR COMPANY, A CORPORATION or OHIO.

LAMP.

Application filed October 29, l'11924. vvSerial No. 746,643.

My invention relates to lamps and is par-k ticularly directed-to headlights for automobiles. More specifically my invention relates to a mechanism by means of which a lamp can `be assembled in condition land adjustment for use. f

Dilhculties have long been experienced in ,removing and replacing an automobile lamp door, and also in properly adjusting the electric; light bulb with relation to the reflector. The constant jarring of the lamps,v particularly those on busses, tends to loosen up the door connections, lresulting in rattling or even loss of doors, and to :rnisad'just` the bulb, thus producinggan objectionable glare. If a congurated lens is used there is usually difhculty in replacing it accurately in the position necessary to gen-y erate the exact required -light `pattern and' at the same time securelyiclosingthe door'. Vhen a conliguratedfreilectorl is used a very accurate. positioning of thefloulb` is required to prevent .glare A means ofi adjustment operativeV from. the outside greatly fac-ilir tates maintaining'the...bulb in the eXactre-- quired location; Moreover,l automobile lamps in useare exposed tothe'l Weather, causing severe Corrosion lofthe parts making it diflicult'to looseny the adjustable parts. One object of'myinventionisto provide a headlight 1in Which the various elements can be quickly, easily and securelyV assembled and adjusted in proper lrelationship oney to the other, for .service usage.

Another object ofthe invention is to proef vide a ,lamp structure in whichV the casing, reflector and lens arev compressively engaged for securely assembling the parts and: sustaining the same against chatter and Which can be easily and conveniently released to Withdraw the lens for access in 'the lamp.

Another object of the invention is to provide compact mechanism for assemblingand adjusting the parts of an automobile'head lamp in proper relationship one to the other.

Another object of the invention is to provide a mechanisml in which thefront closure casing and reflector can be clamped together by means of the reflector. f i Another object of my invention is yto provide a lamp in which 'the reflector can be adjusted Without disturbing the focal adjustment. Y Another object of my invention is to provide a Weather jtightseal between the re preferably of drum shape Vopen at one 'endl Hector and` fronticlosure,thus'protectinglthc. i j

polishedy surface of, the reflector.` Another object of myy invention is to providea lamp in Which the` position of' the source of light can-be adjusted from the outside yOl the lamp casing.

@thier ,objects and certain advantages v Will i appearfrom the description of the 'drawing forming part of this specific-ation, in

'Whichp E, y

*,Fgure 1 `is aside elevation partly in sec-V Y tion.

yFigure-2 is a urel, j l `Filgure?) is a sectionqonline ef-ofFige ure f Figure t'is a section Online lg-.4l of Fig` ure l. l i f Figure 5 is a section on liner 5-5 fof Figs` ure 4,' Il.. l i 1 v Figure Gis ure Y L 1 Figure-7 isa front view of theflamp. 1 Iprovide a lamp casingand a transparent front closure or door adapted. to bep-secured upon the :front of the casing. 'A reflector adapted to press against jtheclos'urefclamps Seemann linee# of' Fig! sectionj'on line 242 of', .1F igi the parts together and Vis.eXteriorly"'ad` justable by means ofa hollovv meinber'f'attached thereto which f, also: .provides space aligned with the lamp bulbv for adjusting from the outside: j k- As di'sclosechl provide a lamp casing l;

Avconventionalmeans vof attachment 3 to the automobile body `is provided at the bottom ol.v said casingT l. I A lamp door" 4;, in this case circular in shape, lits'fover thel Open end of thecasing This doorcomprises "a rim 5, -a transparency f6', andv lclipsf7 at-V tached to the rinnas by rivets 2, these clips holding the transparency 'between them selves andthe rim15. Pins `8, in this case four in number,l extend interiorly throl'ighl the sides of the rim and cooperate with bayonet'slots SprOvided in the edge Aof the lam-p casing; If'desirable,'theibayonet slots may be-located` inf the rim and the pins in'l thel casing.v 'In fact, any mechanism or'lock may beemployed for holding [these two members together. y"lhis bayonet slot and pin construction facilitates the exact posi-l tioning of the configurated :lens Whenever llll i ed to hold packing 12 and press againstthe door, in this case against thetransparent portion. About the shoulder is a circular reflector rim 13 approximately the circumference of the interior of thedrum at its open end. A keyway 14 is cut in this rim and a key 15 is secured, in this case by rivets 16, to the lamp casing to prevent thereflector from rotating in the casing. Riveted centrally to the back of the reflector and J extending vvhorizontally therefrom through thefback ,of the casing is a hollow member, infthis ycase a tubular stem 1,8. YA portion 1 9 ofthe tubular stem extending throughth'e backvof the'lamp casing is exteriorly threaded, in this case with a fine left hand` thread.

Engaging. this thread portion is Jan interiorly threaded adjustment nut frotatively mounted upon the back of the vcasingby meansr of an` annulus 21 on the insideof` Vthel casing, overV which annuhisthe metal of the adjustment nut is spread. 'fj, The adjustment nut20 is accessible l.from the outsideof the casing and has a knurled flange` 22` to facilitategripping and turning. The rotation of this nut translates the reflector' in thevcasing. Thus the 'reflector can be pressed against the front closure, holding all the parts securely together. The spring or flex of thel front closure, reflector and the `casing provide a yieldable pressure conductor 27 connected at one end to the socket 24 and-at the otherend to ia 4conventional terminal socket 28 inl the lamp casing. The socket 24Y is axially adjustable Within general focal range, a. slot 29 in said socket 24 and pin 30 in the tubular stem 18 serving to prevent rotationand determine the adjustment limits. 1

`At'the end of the socket 24 is an inwardly extending yflange 31 against which bears a headed pin 32, the head being Within the socket member and the pin portion extendingpinto the tubular member 18 on the outside 'of ythe socket member` 24.; This pin portionl is threaded into lan elongated focal adjustment nut 33 extending into the-tubular.; stem. About the adjustment member is a coiledspring 34 under compression betvveen` said inwardly extending flange 31 on said socket 24 and an inwardly extending flange 35 at the end of the tubular member. The focal adjustment member isr providedwvith a knurledhead accessible from Without the lamp casing and a' counter-k turned portion 37l adapted to bear against the outside of the end of the tubularstem.

Thus, rotating thisfocal adjustment member fiii suc'h direction as 'to unthread the pin 'permits then coiled spring to press forward the socketV 24 and the bulb 25 mounted therein and rotating the adjustment nut in 1 suchffdirectionff'as Vto thread the Pin, With-V draw the socket and lamp from` the reflector cavity. By thesemeans exact focal adjustment of the 'source -of light' in relation to the reflector Vcan be easilyv made from the outsideof the lamp casing.

The tubular stem externally threadedv to permit the translating 'of the reflector againstl'they front closureto clamp vor lock the`parts together'andadapted vto hold means .to adjust` the bulb in the reflector,

enables me tofprovide a headlightvvhich can' be easily assembled and adjustedfwithout the difficulties commonly experiencedzvvith those lamps with which automobiles are generally equipped. i x Y l 'Having thus described my invention, I claimi 1. A lamp comprising a casing open at one end, a lamp door includingy a transL parency adapted tofit over the open end of said casing, bayonet slots and pins oppos-` ingly disposed-in saidv door andcasing, av reflector` adaptedv to press against the door and secure it to the casing, a tubular stem centrally'located on ythe backzof the reflector extending through'` the back ofthe ..cas'ing,

providing-access to the reflector cavity, al

sleeve mounted in'ithe .reflector end of the tubular stem providing a socket for a lamp extendingfinto the reflector cavity, an internally extending shoulder'on the opposite end of vthe sleeve, a headedpininthe sleeve, the pin portion extending outwardly`- into thetubular member, a focal `adjustment nut, exteriorly accessible, threaded upon said pin, a .coil spring `'in thetubularstem under compressionbetweenthe shouldery on the sleeve and ashoulder on the endy offtheatubular liu stem, and a reflector adjusting `nut rotatively mounted in the back of the casing-adapted to translate the stem. .r2- A head lamp'acomprising `a casing', a transparent -door adapted to closev thefor-` Ward end `of said casing, locking means between 'said v.door and casingv for securing the door to thecasing againstoutward displacement, a reflector mountedwithin the casing and havinga yflange at its forward end, said flangevinI engagement with, saidI transparentl door, la tubular stem secured f centrally ofthe reflector and extending rear- Wardly therefrom, saidt-ubular stem trans.- latably extending through the back of the reflector, and a nut having la rotatable bearing in the back ofthe reflector and maintained therein against longitudinal move;

ment, said bearing nut having a threadedl engagement with the outer end of the tubular stem, whereby rotation of thefnut moves the reflector against the transparent door under the flexing of the casing rear wall.v

3. A lamp, comprising, a casing open at one end, a rim secured around the casing open end, a transparency disposed against the inner rim edge, a reflector translatably and nonrotatably mounted in the casingLa tubular stem attached to said reflector and extending rearwardly through the back of the casing, a nut screw threaded on said tubular stem, said nut rotatably mounted in the back of the casing for manipulation from the exterior thereof, a sleeve'mounted.v

in the tubular end of the stem, said sleeye socketing. a lamp extending into the reflector cavity, a screw threaded extension on the rear of the s1eeVe,'-an inwardly extend- `ing shoulder at the rear of the tubular stem,

.a focal adjustment nut exteriorly accessiblel sleeve and the shoulder at the end of thel tubular stem.

- In witness whereof, Ihereunto subscribe my name. y

CHARLES D. RYDER. Y 

